Regiospecific Oxyhalogenation of Aromatics Over SBA-15-Supported Nanoparticle Group IV–VI Metal Oxides

Abstract

TiOx, VOx, MoOx and WOx supported on SBA-15 exhibit efficient catalytic activity for oxyhalogenation of aromatics with the H2O2-halide ion system. Unlike the hitherto known solid catalysts, these reusable catalysts yield the para-halogenated product with 100% selectivity at 298 K and moderate acidic pH (3–5). The catalytic activity was enhanced by five orders of magnitude when supported on SBA-15. TiOx, VOx, MoOx and WOx supported on SBA-15 exhibit high catalytic activity for regiospecific oxyhalogenation of aromatics with the H2O2-halide ion system. The reaction occurs at 298 K and moderate acidic pH (3–5). The catalytic activity of these catalysts is higher than most of the hitherto known solid catalysts and unsupported metal oxides.